The factors that influence the selection of mining ways

The nature of mining processes creates a potential negative impact on the environment both during the mining operations and for years after the mine is closed. This impact has led to most of the world’s nations adopting regulations to moderate the negative effects of mining operations. Safety has long been a concern as well, though modern practices have improved safety in mines significantly.

Mining methods are constantly changing and improving as companies forge new
technologies to enhance rates of extraction and minimise impacts such as noise,
dust and land and water disturbance. There are numerous mining methods utilised
around the world including open-cut mining (truck-and-shovel, strip mining,
quarrying and dragline), underground mining (stoping methods, bord-and-pillar,
longwall, caving methods, cut-and-fill and retreat benching) and highwall mining
hammer
crusher.

There is a wide variety of methods of extraction which one can choose from as
the orebodies have shapes and sizes. The orientation and shape of an orebody,
the strength of the ore and thesurrounding rock and the form in which the
valuable materials are distributed are different for each ore area.

These factors among others are what will influence the selection of a mining
method and the overall plan for developing the orebody. Operating mines vary in
size from small underground operations (some of these operations have only a few
levels of production and may produce less than 100 tonnes of ore per day) to the
large open pits (some of which move thousands of tonnes or ore and waste rock
per day).

The primary opening into an underground mine can either be a shaft, a ramp
(which can also be called a decline) is driven downinto the earth, or an audit
which is a horizontal opening that is driven into the side of a mountain or
hill. They all have the same purpose – to provide access for people, equipment
and materials and to supply a way of making ore to be brought to the surface.
Most of the time, shafts are vertical, but they can also be inclined, they are
equipped with headframes and hoists, the headfames are the structures at the top
of the hoist which enclose it.

On the other hand, ramps, most of the time spiral downward at a gradient of
about 15% to permit access into the mine by mobile equipment which are
rubber-tired. In few cases, the ramps are driven in straight lines to
accommodate conveyor belts, or they have straight runs with switch back points.
Ramps are in most cases cheaper than shafts when it comes to developing. But the
total cost might be higher than the cost of developing a shaft to reach the
depth desired when it is dependent on the angle of the decline, the size of the
opening and the encountered ground conditions.

Henan Hongxing Mining
Machinery Co., Ltd is a large-sized compound crusher, industrial grinding machines
manufacturer, and the mining equipment we researched and developed with great
concentration plays an active role in the mining and ore beneficiation industry
and is one of the indispensable mining crushing equipment in the mining
industry.

"The factors that influence the selection of mining ways" was written by luoxuefeihua under the Technology category. It has been read times and generated 0 comments. The article was created on 24 January 2013.

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